Question

我试图确保日志文件不会超过1048576字节。由于Scrapy使用python logging模块，我试图将Scrapy的默认FileHandler更改为RotatingFileHandler。

我无法在Scrapy文档或设置中找到任何相关信息。我的想法是覆盖蜘蛛的__init__()方法（我有一只蜘蛛）。

def __init__(self, *a, **kw):
    self.logger.logger.root.handlers[-1] = RotatingFileHandler('log.log',maxBytes=1024,backupCount=1)
    super(MainSpider, self).__init__(*a, **kw)

但scrapy在蜘蛛初始化之前记录数据。

2017-10-26 13:16:15 [scrapy.utils.log] INFO: Scrapy 1.4.0 started (bot: engine_bot)
2017-10-26 13:16:15 [scrapy.utils.log] INFO: Overridden settings:
....

有没有办法让这个工作或设置Scrapy默认日志文件的最大大小？

Answer 1

您必须按照configure_logging中的说明使用install_root_handler=False致电https://doc.scrapy.org/en/latest/topics/logging.html#module-scrapy.utils.log。

import logging
from logging.handlers import RotatingFileHandler

from scrapy.utils.log import configure_logging


# Disable default Scrapy log settings.
configure_logging(install_root_handler=False)

# Define your logging settings.
log_format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
log_level = logging.INFO  # Or better yet get `LOG_LEVEL` from settings.
log_file = 'log.log'  # Or better yet get `LOG_FILE` from settings.

logging.basicConfig(
    format=log_format,
    level=log_level
)

rotating_file_log = RotatingFileHandler(log_file, maxBytes=1024, backupCount=1)
rotating_file_log.setFormatter(logging.Formatter(log_format))

root_logger = logging.getLogger()
root_logger.addHandler(rotating_file_log)

通过这种方式，您将登录到控制台（根据basicConfig默认设置;但是，可以删除此处理程序）和旋转文件。

如何为Scrapy项目（或最大大小）设置RotatingFileHandler

1 个答案: